lunken



(No Mohel.)

E. H. LUNKEN.

STEAM WHISTLE. No. 503,547. Patented Aug. 15, 1893.

UNITED STATES PATENT OFFICE.

EDMUND H. LUNKEN, OF CINCINNATI, OHIO, ASSIGNOR TO THE LUNKEN- HEIMERCOMPANY, OF SAME PLACE.

STEAM-WHISTLE.

SPECIFICATION forming part of Letters Patent No. 503,5d7, dated August15, 1893.

Application filed November 14, 1892. Serial No. 451,849. (No model.)

To all whom it may concern:

Be it known that I, EDMUND H. LUNKEN, a citizen of the United States,residing at Oincinnati, in the county of Hamilton and State of Ohio,have invented certain new and useful Improvements in Steam-Whistlespfwhich the following is a full, clear, and exact description, referencebeing had to the accom panying drawings, forming part of thisspecification.

My invention relates to all classes of steam whistles having a bellvertically set over the base, and it has for its object the productionof means for actuating the piston within the bell to vary the sound ofthe whistle.

The novelty of my invention will be hereinafter set forth andspecifically pointed out in the claim.

In the accompanying drawings:Figure 1 is an elevation partly in sectionof a steam whistle embodying my invention. Fig. 2isa corresponding viewshowing a modification in the construction.

The same letters of reference are used to indicate identical parts inboth the figures.

In the drawings the whistle is shown as constructed in accordance withmy prior patent, No. 476,472, of June 7, 1892, with the exception of thepiston actuating mechanism, and in describing it, it is only necessaryto say that A is the base with pipe connection B, steam valveC withactuating lever D, annular slit E concentric with the bell mouth for theescape of the steam, bell supporting spider F, and bell G. Fitted so asto slide freely within the bell is a piston II to which is attached atthe middle a guiding rod I which in Fig. 1 extends from the upper sideof the piston through an aperture Ct in the top of the bell, and in Fig.2 extends from the under side of the piston through a bore in the stemof the spider F which is provided with a stuffing box I) and out throughthe bottom of the base, likewise provided with a stuffing box a.

In Fig. 1, there is a coiled spring J surrounding the rod I andhavingits upper end secured in any suitable manner to the top of thebell and its lower end secured to the piston, the

purpose of which spring is to normally hold the piston up to its highestpoint in the bell. Suitably journaled between the base and the bell, inthis instance in a slot in the spider F, is a grooved guide pulley whoselower edge is below the level of the bell mouth, and secured to thepiston at or near its middle is a chain or cord L which extends downaround the pulley 7c and out to any point within reach of the operator.It will be seen from this construction that by pulling upon the chain orcord L the piston is drawn down and upon releasing the chain or cord thepiston is drawn up by the spring J aided by the pressure of the steamwithin the bell, when the valve 0 is opened, and in this way the soundof the whistle is varied to suit the fancy of the operator, as will bereadily understood. In this way I am enabled to operate the piston fromthe same point at which the valve is operated by simply pulling upon andreleasing the cord or chain which constitutesa flexible connection forthe piston. As also coming within my invention the spring J might beomitted where the piston is drawn down by the chain or cord, for thepressure of the steam within the hell would raise the piston uponreleasing the chain or cord, and providing suitable vents in the top ofthe bell, as will be readily understood.

In Fig. 2 the spring is between the stem of the spider and the underside of the piston and acts by expansion to raise the piston.

Having thus fully described myinvention, I claim In a steam-whistle, thecombination of the bell G, a spider F with pulley K journaled thereon,the piston II held up by the spring J and provided with the guide rod I,and the operating chain or cord L running into said bell to said piston,for operating the latter, substantially as described.

EDMUND I'I. LUNKEN.

Witnesses:

GEORGE S. BAILY, BERNARD J. HAUsFnLDT.

